1. Fundamentals of Algebra
Chapter 2 Unit 1

2. Mathematical Expressions
A mathematical expression can be a numerical expression or an algebraic expression
A numeric expression contains numerals and indicates at least one mathematics operation
An algebraic expression contains one or more variables and mathematics operations. It may also contain numerals. A variable is a symbol, usually a letter, used to represent a number
A mathematical expression does NOT contain the less then, equal to, or greater than symbol

3. You can write mathematical expressions from word phrases
Expression Type
Four times the sum of five and zero
4(5+0)
Numerical
Two more than the product of 8 squared and 10
(8 2 *10) +2
Half the difference between 12 and 7
1 2 (12-7)
One third the sum of a number n and 7
1 3 (n+7)
Algebraic
The sum of a number b and 8 divided by 2
𝑛+8 2
4 more points than Cal scored (c)
C+4
Twice as many DVDs as Bob has (d) 2D

4. You can also write word phrases from mathematical expressions
Addition Expression -|-3|+a
Subtraction Expression |b|-7
Multiplication Expression 5 𝑛 3
Division Expression -9÷x

5. Write each as a numerical expression
The sum of 1.5 and 3
8 increased by -5
Half the product of 6 and 3

6. Write each as a word phrase
-3n
5(a+1)
2n+3

7. Write each as a word phrase
𝑥−12 2
10 2𝑛
4a-|6|

8. Homework
Chapter 2 Unit 1
All odds